Question 343602
Add the equations together.
{{{x+y+x-y=7-1}}}
{{{2x=6}}}
{{{highlight(x=3)}}}
Now use either equation to solve for y.
{{{3+y=7}}}
{{{highlight(y=4)}}}
.
.
.
{{{drawing(300,300,-2,7,-2,7,grid(1),circle(3,4,0.2),graph(300,300,-2,7,-2,7,7-x,x+1))}}}